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    <title>性能调优 on 黄文卓 | DevOps Engineer</title>
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      <title>Kubernetes cgroup v2 迁移实践</title>
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      <author>17691281867@163.com (Wenzhuo Huang)</author>
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      <description>K8s 1.25+ 默认启用 cgroup v2，MemoryQoS 和 PSI 等新特性只在 v2 支持。本文给出完整的节点迁移操作流程和常见问题解决方案。</description>
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      <title>bpftrace 实战：线上问题排查的瑞士军刀</title>
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      <pubDate>Sun, 12 Apr 2026 10:00:00 +0800</pubDate>
      <author>17691281867@163.com (Wenzhuo Huang)</author>
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      <description>strace 太重、perf 太原始、BCC 工具集要装一堆依赖——bpftrace 是这三者之间的平衡点。本文用四个真实场景讲清楚 bpftrace 的工作方式，帮你把它变成日常排查工具。</description>
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      <title>ClickHouse 生产运维实战：集群部署、副本分片、性能调优与故障排查</title>
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      <pubDate>Sun, 15 Mar 2026 10:00:00 +0800</pubDate>
      <author>17691281867@163.com (Wenzhuo Huang)</author>
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      <description>ClickHouse 高吞吐 OLAP 能力背后有一套独特的运维范式：ReplicatedMergeTree、ZooKeeper/Keeper、分布式表、物化视图、TTL、MergeTree 家族选型。本文按生产落地路径，从集群规划、副本分片、写入优化、查询调优、物化视图到慢查询排查，配套可直接复用的 SQL 与运维脚本。</description>
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      <title>Linux 性能调优实战：CPU、内存、IO 瓶颈的系统排查方法</title>
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      <pubDate>Sun, 08 Sep 2024 13:50:00 +0800</pubDate>
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      <description>从工具链选择到实战排查，梳理 Linux 性能调优的完整方法论：CPU 上下文切换与软中断分析、OOM 日志解读、IO 调度器选择、TCP TIME_WAIT 处理，以及容器环境下 cgroup 限制的特殊影响。</description>
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